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Study on Monitoring System for Coastal Environments

海岸带环境监测系统研究

基本信息

批准号：
14350528
负责人：
OKUNO Taketoshi
金额：
$ 9.28万
依托单位：
Osaka Prefecture University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14350528/
关键词：
Coastal Environments Monitoring System Automatic Measurement of Nutrient Image Measurement Ecosystem Model Data Assimilation 時間連続計測

项目摘要

In this research, "Study on Monitoring System for Coastal Environments", three sub-themes have been settle as (1)Image measurement for extended wide region, (2)Automatic continuous measurement of nutrient and also (3)Assimilation technique for measured data. The obtained results are summarized as following.1.The so-called Ocean Collar Algorithm is useful for the sea where the concentration of chlorophyll is fairly high. However, it is difficult to apply to the coastal sea where its concentration is low and the suspend matter effects to the measurement strongly. The new method for measuring chlorophyll concentration is proposed using several optical filters. It is shown that the spectrum of irradiance gives the concentration correctly.2.Particle Image Velocimetry, PIV, is a useful technique to measure the velocity distribution of coastal sea area. The co-ordinate of Image data should be transformed correctly. The conventional cross-correlation method is very effective for the measurement the velocity distribution.3.The flow injection method, which has been developed in this research, is very practical and useful for the automatic measurement. It is employed here mainly. It is found that the nutrient can be measured as nitrate.4.The method of using ultra violet light has been developed for measuring nutrient. It would be interesting one in the future.5.The assimilation method for measured data to mathematical model has been study as the basic problem, which should be developed in the future.

在“沿海环境监测系统研究”中，确定了三个子主题：(1)广域图像测量，(2)营养物质自动连续测量，(3)测量数据同化技术。所得结果总结如下：1。所谓的“海洋项圈算法”适用于叶绿素浓度相当高的海洋。但是，由于其浓度较低，悬浮物对测量的影响较大，因此难以应用于沿海海域。提出了利用若干滤光片测量叶绿素浓度的新方法。结果表明，辐照度谱准确地给出了浓度。粒子图像测速技术（PIV）是一种测量沿海海域速度分布的有效技术。对图像数据的坐标进行正确的变换。传统的互相关法对速度分布的测量是非常有效的。本研究提出的流动注射法是一种非常实用的自动测量方法。主要在这里使用。发现该营养物可测定为硝酸盐。提出了用紫外光测定营养物的方法。将来会很有趣的。实测数据对数学模型的同化方法作为基础问题进行了研究，这是今后需要进一步发展的问题。